Hello!I would like to answer something about strings.I have made a hashmap which the key is a char,especially a letter and the value is two integers.Each letter corresponds in two integers.For example h thas the key 99.I want to print each phrase i give as a stirng of integers.Especially for hello i want o print it like 9987656534. To return this string of integers i have done this: String.valueOf(a1.values()); a1 is my hashmap but my result is [99,87,65,65,34].How can fix this?
Thank you!
You cannot express 9987656534 as an int/Integer; it is outwith its range. If you are getting [99,87,65,65,34], that must be printing a List<Integer>. Please explain what you are doing, as JJ asked. Is this some sort of encoding and decoding exercise?
There are probably plenty of helper methods in Apache Commons to do this for you, but it's actually a good exercise to write this kind of thing from scratch once.
This is what I would do, step by step:
- Create an empty StringBuilder
- Retrieve the KeySet from the Map
- Loop through the KeySet (for each key)
- Retrieve the value for that key
- Append the value onto the StringBuilder
- After the loop, return the StringBuilder.toString()
What puzzles me is the following: the outcome, a Collection of Integers, is the result of String.valueOf(a1.values()).
In this is a1 the HashMap that OP talks about in his opening post. Given the result, the keys must have been h, e, l and o (no duplicates). So, how come an output of five integers? Wonder what the code looks like, as Joao asked.
There are three kinds of actuaries: those who can count, and those who can't.
JJ.
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